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CRITICAL POINT DRYING AS A PREPARATIVE TECHNIQUE FOR SCANNING ELECTRON MICROSCOPY AND ITS APPLICATION IN LIMNOLOGY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R. H.M. Cross --- , South Africa B.R. Allanson --- , South Africa B.R. Davies --- , South Africa C. Howard-Williams --- , South AfricaThe preservation technique of critical point drying for use with the scanning electron microscope is described. A study of the periphyton community development on the aquatic macrophyte, Potamogeton pectinatus L. from the littoral zone of Swartvlei, southern Cape Province, is... -
Variation Reduction and Lu Lu-smoothing
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: C.H. RohwerIn the space of absolutely summable sequences the total variation of a sequence becomes a natural norm, and is a measure of smoothness. This norm is preserved by the so-called LU LU-smoothers, in that the variation of the image plus... -
Fully Trend Preserving Operators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: C.H. RohwerThe concept of fully trend preserving (ftp) operators on sequences was introduced to prove variation preservation on the outputs of LULU-separators. It turns out that this property is central in further analysis of compositions of LULU-smoothers, and other smoothers. Several... -
Some notes on the effect of wet-storage on timber
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: F.S. Malan --- Komatiland Forests Pty Ltd, AfricaThe storage of logs under water sprays has proved to be a highly effective method to preserve logs over prolonged periods against drying defects and infestation by staining fungi. Wet-storage has little effect on wood quality apart from some degradation... -
Fermentative characteristics of Digitaria eriantha subsp. eriantha silage harvested at different stages of maturity
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WA van Niekerk Abubeker Hassen FM BechazAn experiment was conducted to investigate the influence of stage of growth at harvest on fermentative characteristics of Digitaria eriantha subsp. eriantha silage. The treatment included three different growth stages (early vegetative, boot stage and full-bloom stage). The materials were... -
LULU operators for functions of continuous argument
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Roumen Anguelov Carl RohwerThe LULU operators, well known in the nonlinear multiresolution analysis of sequences, are extended to functions defined on a continuous domain, namely, a real interval. We show that the extended operators replicate the essential properties of their discrete counterparts. More... -
Cryopreservation as a tool for the conservation of Eucalyptus genetic variability: concepts and challenges
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: K Padayachee MP Watt N Edwards DJ MycockAn essential criterion of Eucalyptus tree breeding programmes employed by the commercial forestry sector is the maintenance of potentially important species and genotypes for periods commensurate with field testing. Current methods for this purpose include conservation stands, clonal hedges and... -
Management with fertility preservation of an ovarian juvenile granulosa cell tumour presenting with retroperitoneal spread and bilateral ureteric obstruction
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: G C Du Toit --- Part-Time Consultant, Unit of Gynaecological Oncology, Tygerberg Hospital, University of Stellenbosch, -
Effects of urea addition on the fermentation of sorghum (Sorghum bicolor) silage
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ana Paula Maia dos Santos --- Programa de Pós-Graduação em Zootecnia, Brazil Edson Mauro Santos --- Programa de Pós-Graduação em Zootecnia, Brazil Juliana Silva de Oliveira --- Programa de Pós-Graduação em Zootecnia, Brazil Ossival Lolato Ribeiro --- Universidade Federal do Recôncavo da Bahia, Brazil Alexandre Fernandes Perazzo --- Bolsista DCR/FAPESB/CNPq, Brazil Ricardo Martins Araújo Pinho --- Programa de Pós-Graduação em Zootecnia, Brazil Alberto Jeferson da Silva Macêdo --- Programa de Pós-Graduação em Zootecnia, Brazil Gildenia Araújo Pereira --- Programa de Pós-Graduação em Zootecnia, BrazilThis study was conducted to evaluate the effects of urea addition on fermentation characteristics, losses and chemical composition of silage of sorghum (Sorghum bicolor) ‘BRS Ponta Negra’. The sorghum plant was chopped and treated with different levels of urea (0.1756,... -
Strategies and Technologies for Camel Milk Preservation and Utilization of Non-Marketed Milk in Arid and Semi-Arid Areas
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Jackline Akinyi Ogolla --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, Germany Christian Dede --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, Germany Michael Wandayi Okoth --- University of Nairobi. College of Agriculture and Veterinary Sciences. Department of Food Science, Nutrition and Technology, Kenya Oliver Hensel --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, Germany Barbara Sturm --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, GermanyThis study determined the seasonal fluctuations in camel milk yield, consumption, spoilage and spillages, and explored its forms of consumption and the acceptability of camel milk powder in Isiolo County, Kenya. In addition, the utilization of non-marketed milk, preservation technologies,... -
Nutritional properties and in vitro gas production in cactus pear (Opuntia stricta) and cassava (Manihot esculenta) shoot silages
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- Universidade Federal do Vale do São Francisco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Vale do São Francisco, Brazil --- Universidade Estadual do Sudoeste da Bahia, Brazil --- Universidade Federal do Tocantins, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- , Brazil --- Universidade Federal do Maranhão, Brazil --- Universidade Federal do Vale do São Francisco, BrazilThis study evaluated the effects of different inclusion levels of cactus pear (Opuntia stricta) (at 0%, 15%, 30% or 45% on fresh matter basis) ensiled with shoots of cassava (Manihot esculenta) on the mineral nutrients, carbohydrates fractionation, nitrogen compounds and... -
Efficacy of immunosuppression in preserving beta cell function and reducing insulin requirements in Type 1 diabetes mellitus: a comprehensive review
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Pillay --- University of KwaZulu-Natal, South Africa A Pillay --- DRAM Consulting, South Africa A Kalhan --- Royal Glamorgan Hospital, UK -
Effectiveness of YouTube in the learning and preservation of the Yoruba language in Nigeria
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Babatunde Adeyeye --- North-West University, South Africa Abiodun Salawu --- North-West University, South AfricaThis study investigated YouTube’s effectiveness in the learning and preservation of the Yoruba language among youths of Ota, Ogun State, Nigeria. Data was collected through a mixed-methods approach using a survey and content analysis. Findings demonstrate the awareness (85%) of... -
Approximation and Compactness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: E. Colebunders --- Vrije Universiteit Brussel, België R. Lowen --- Universiteit Antwerpen, BelgiëIn approach theory convergence is described by means of limit and adherence operators acting on filters or ultrafilters. The value of the limit resp. adherence operator on an (ultra)filter in a point x is interpreted as the distance that the...